I asked them and they said it didn't come with instructions.
All i have to do apparently if find out which of the 3 wires is earth (which is easy enough) and find out which of the other 2 are low speed and high speed.
I did ask how i know where to put them on the new switch and all he said was that they were numbered?
 
The only reason i'm getting the cooler parts is i have a problem when sat in traffic for 5 minutes or more.
I think it might be due to my huge pro alloy intercooler sitting in front of the radiator so this is the only way of stopping it as far as i can tell.
 
Yeah, it "conditions" the water, never heard anything bad against it tbh.

If there is 3 on he standard switch, just wire it up the same.
 
Interested to see how you get on with this, had a look at it when down at Awesome GTI.

Try PM'ing CupraMVR, he worka as a technician for Awesome